Microstructure and Properties of Atmospheric Plasma Sprayed (Al,Cr)2O3–TiO2 Coatings from Blends

Abstract Coatings prepared from chromia-rich (Al,Cr) 2 O 3 solid solution (ss) feedstock powders are intended to improve the properties of Cr coatings, but rarely studied so far. In this work, processability a commercial powder containing 78 wt.% by atmospheric plasma spraying (APS), corresponding coating microstructures and were investigated. Possible further improvements expected blending with 2, 23 54 TiO x powder. For comparison, plain coatings as well. The analyzed using SEM, EDS XRD measurements. Hardness (HV0.3) was measured, well dry unidirectional sliding wear resistance abrasion (ASTM G65). Moreover, corrosion electrical insulating measured. ss showed only small change composition, formation ? -Al , found for alumina-rich powders, avoided. Compared chromia coating, some found. most balanced performance achieved both high resistance, in combination resistance.